Anti-falling structure for connection of telescopic pipe body

Abstract

The utility model relates to an anti-falling structure for connection of a telescopic pipe body. The anti-falling structure is characterized by comprising an outer pipe body, an inner pipe body, a guide pipe sleeve and an anti-falling pipe sleeve, a guide pipe sleeve and an anti-falling pipe sleeve are arranged on an inner pipe body; the guiding pipe sleeve facilitates guiding movement between the inner pipe body and the outer pipe body; a tongue plate structure is arranged on the anti-falling pipe sleeve, a limiting block is arranged by means of elastic deformation of a tongue plate, and the tongue plate on the anti-falling pipe sleeve is arranged in a flat reducing area of the inner pipe body under pressing of the limiting block so that the inner pipe body can be conveniently inserted. The limiting block is driven to be embedded into the limiting hole of the outer pipe body through springback of the tongue plate; the anti-falling structure is convenient and fast to install and operate.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe connection, in particular to an anti - detachment structure for telescopic pipe connection. Background Art

[0002] Generally, in order to ensure that two telescopically connected pipe structures do not become detached during telescopic adjustment, an anti - detachment structure needs to be provided at the connection of the two pipes. This ensures that the two pipes can be telescopically adjusted without becoming detached. A common anti - detachment method for connecting pipes is to use a limit pin structure driven by a spring between the pipes. However, this limit pin structure can only perform telescopic connection at fixed - length positions and cannot achieve free telescopic adjustment. Therefore, an anti - detachment structure is needed that allows the telescopic pipe to freely expand and contract without falling off. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an anti - detachment structure for telescopic pipe connection, which can solve the problems of complex anti - detachment connection structure and inconvenient installation and adjustment between general telescopic pipes.

[0004] To solve the above - mentioned technical problem, the technical solution of the utility model is as follows: an anti - detachment structure for telescopic pipe connection, the innovation of which lies in: it includes an outer pipe body, an inner pipe body, a guiding sleeve, and an anti - detachment sleeve;

[0005] One end of the outer pipe body is open - ended and accommodates the inner pipe body to be embedded. A limit hole is provided on the outer pipe body near the open - ended portion perpendicular to the axis direction;

[0006] One end of the inner pipe body that cooperates with the outer pipe body is an assembly end. At least one flat reduced - diameter area is circumferentially provided near the assembly end position of the inner pipe body. A pin hole is provided perpendicular to the axis direction of the inner pipe body between the flat reduced - diameter area and the end face of the assembly end on the inner pipe body;

[0007] The guiding sleeve is nested at the assembly end of the inner pipe body, and is fixed by cooperating with the pin hole on the inner pipe body through a pin; the outer contour of the guiding sleeve is closely fitted with the inner wall of the outer pipe body;

[0008] The anti - detachment sleeve is nested on the inner tube body, and the anti - detachment sleeve can move along the axial direction of the inner tube body to be located at or away from the flattened and reduced - diameter area of the inner tube body; at least one U - shaped through - groove is formed on the anti - detachment sleeve, a tongue plate is formed at the U - shaped through - groove, and the tongue plate can elastically deform in the axial direction of the inner tube body by pressing at the flattened and reduced - diameter area of the inner tube body, and can return to its original state when the pressing state is released; a limiting block is arranged on the outer wall of the tongue plate; by pressing the limiting block at the flattened and reduced - diameter area of the inner tube body with the anti - detachment sleeve, the limiting block is embedded in the outer tube body together with the guiding sleeve, and when the limiting block on the anti - detachment sleeve moves to the limiting hole of the outer tube body, the elastic potential energy of the tongue plate is used to drive the limiting block to be embedded in the limiting hole of the outer tube body, so as to realize the anti - detachment limit between the outer tube body and the inner tube body.

[0009] Furthermore, the guiding sleeve and the anti - detachment sleeve have the same outer diameter.

[0010] Furthermore, two flattened and reduced - diameter areas are arranged on the inner tube body at an included angle of 180°; two U - shaped through - grooves are arranged on the anti - detachment sleeve at 180°, and tongue plates are respectively formed at the U - shaped through - grooves, and limiting blocks are arranged on the tongue plates.

[0011] The advantages of the present utility model are as follows:

[0012] 1) In the present utility model, the guiding sleeve and the anti - detachment sleeve are respectively arranged on the inner tube body; the guiding sleeve facilitates the guiding movement between the inner tube body and the outer tube body; a tongue - plate structure is arranged on the anti - detachment sleeve, and a limiting block is arranged by utilizing the elastic deformation of the tongue plate. The tongue plate on the anti - detachment sleeve is placed at the flattened and reduced - diameter area of the inner tube body under the pressing of the limiting block, which is convenient for the insertion of the inner tube body; the rebound of the tongue plate drives the limiting block to be embedded in the limiting hole of the outer tube body; this anti - detachment structure is convenient and fast to install and operate. Description of the Drawings

[0013] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0014] Figure 1 It is a schematic diagram of an anti - detachment structure for connecting telescopic tube bodies of the present utility model.

[0015] Figure 2 It is an exploded view of an anti - detachment structure for connecting telescopic tube bodies of the present utility model. Specific Embodiments

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated here usually can be arranged and designed in various different configurations.

[0017] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0018] As Figure 1 Figure 2 shown, a telescopic pipe connection anti-disengagement structure includes an outer pipe body 1, an inner pipe body 2, a guiding sleeve 4, and an anti-disengagement sleeve 3.

[0019] One end of the outer pipe body 1 is open and accommodates the inner pipe body 2 to be embedded. A limiting hole is provided on the outer pipe body near the open end perpendicular to the axis direction.

[0020] One end of the inner pipe body 2 that cooperates with the outer pipe body is an assembly end, and at least one flattened reduced-diameter area is circumferentially provided near the assembly end. A pin hole is provided perpendicular to the axis direction between the flattened reduced-diameter area on the inner pipe body 2 and the end face of the assembly end.

[0021] The guiding sleeve 4 is nested at the assembly end of the inner pipe body 2, and is fixed by cooperating with the pin hole on the inner pipe body 2 through a pin 5; the outer contour of the guiding sleeve 4 is closely fitted with the inner wall of the outer pipe body 1.

[0022] The anti-disengagement sleeve 3 is nested on the inner pipe body, and the anti-disengagement sleeve 3 can move along the axis direction of the inner pipe body 2 to be located at or away from the flattened reduced-diameter area of the inner pipe body 2; at least one U-shaped through groove is provided on the anti-disengagement sleeve 3, and a tongue plate is formed at the U-shaped through groove. The tongue plate can elastically deform in the direction of the axis of the inner pipe body 2 by pressing at the flattened reduced-diameter area of the inner pipe body and can return to its original state when the pressing state is released; a limiting block 31 is provided on the outer wall of the tongue plate; by pressing the limiting block 31 at the flattened reduced-diameter area of the inner pipe body 2 by the anti-disengagement sleeve 3, the limiting block 31 is embedded into the outer pipe body together with the guiding sleeve 4. The limiting block on the anti-disengagement sleeve 3 moves to the limiting hole of the outer pipe body 1, and the limiting block is driven by the elastic potential energy of the tongue plate to be embedded into the limiting hole of the outer pipe body 1 to realize the anti-disengagement limit between the outer pipe body 1 and the inner pipe body 2.

[0023] The guiding sleeve 4 and the anti-disengagement sleeve 3 have the same outer diameter.

[0024] Two flattened reduced-diameter areas are provided on the inner pipe body 2 at an included angle of 180°; two U-shaped through grooves are provided on the anti-disengagement sleeve 3 at 180°, and tongue plates are respectively formed at the U-shaped through grooves, and limiting blocks 31 are provided on the tongue plates.

[0025] The working principle of the present utility model is as follows: a guiding sleeve and an anti - detachment sleeve are respectively arranged on the inner tube body; the guiding sleeve facilitates the guiding movement between the inner tube body and the outer tube body; a tongue plate structure is arranged on the anti - detachment sleeve, and a limiting block is arranged by utilizing the elastic deformation of the tongue plate. The tongue plate on the anti - detachment sleeve is placed in the flattened reduced - diameter area of the inner tube body under the pressing of the limiting block to facilitate the insertion of the inner tube body; the rebound of the tongue plate drives the limiting block to be embedded in the limiting hole of the outer tube body; this anti - detachment structure is convenient and fast to install and operate.

[0026] Those skilled in the art should understand that the present utility model is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A telescopic pipe body connection anti - detachment structure, characterized in that: It includes an outer tube body, an inner tube body, a guiding sleeve and an anti - detachment sleeve; One end of the outer tube body is open - ended and accommodates the inner tube body to be embedded. A limiting hole is arranged on the outer tube body near the open - end perpendicular to the axis direction; One end of the inner tube body that cooperates with the outer tube body is an assembly end. At least one flattened reduced - diameter area is arranged circumferentially near the assembly end. A pin hole is arranged perpendicular to the axis of the inner tube body between the flattened reduced - diameter area and the end face of the assembly end on the inner tube body; The guiding sleeve is nested at the assembly end of the inner tube body, and is fixed by being matched with the pin hole on the inner tube body through a pin; The outer contour of the guiding sleeve is in close fit with the inner wall of the outer tube body; The anti - detachment sleeve is nested on the inner tube body, and the anti - detachment sleeve can move along the axis direction of the inner tube body to be located at or away from the flattened reduced - diameter area of the inner tube body; At least one U - shaped through - groove is arranged on the anti - detachment sleeve, and a tongue plate is formed at the U - shaped through - groove. The tongue plate can elastically deform in the direction of the axis of the inner tube body by pressing at the flattened reduced - diameter area of the inner tube body, and can return to its original state when the pressing state is released; A limiting block is arranged on the outer wall of the tongue plate; By pressing the limiting block at the flattened reduced - diameter area of the inner tube body by the anti - detachment sleeve, the limiting block is embedded into the outer tube body together with the guiding sleeve. The limiting block on the anti - detachment sleeve moves to the limiting hole of the outer tube body, and the limiting block is driven by the elastic potential energy of the tongue plate to be embedded into the limiting hole of the outer tube body, realizing the anti - detachment limit between the outer tube body and the inner tube body.

2. The anti - detachment structure for connecting telescopic pipe bodies according to claim 1, wherein: The outer diameters of the guiding sleeve and the anti - detachment sleeve are the same.

3. The anti - detachment structure for connecting telescopic pipe bodies according to claim 1, characterized in that: Two flattened reduced - diameter areas are arranged on the inner tube body at an included angle of 180°; Two U - shaped through - grooves are arranged on the anti - detachment sleeve at 180°, and tongue plates are respectively formed at the U - shaped through - grooves, and limiting blocks are arranged on the tongue plates.

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